package com.itheima.reggie.service.impl;

import cn.hutool.core.util.IdUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.ResultInfo;
import com.itheima.reggie.domain.Category;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Date;
import java.util.List;

@Service
@Transactional
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;

    @Override
    public List<Category> findAll() {
        return categoryMapper.findAll();
    }
    //保存
    @Override
    public void save(Category category) {
        //设置id
        category.setId(IdUtil.getSnowflake(1,1).nextId());

        //设置时间
        //category.setCreateTime(new Date());
       // category.setUpdateTime(new Date());

        //todo 设置操作人
       // category.setCreateUser(1L);
       // category.setUpdateUser(1L);

        //保存到数据库
        categoryMapper.save(category);
    }
    //修改
    @Override
    public void update(Category category) {
        //1. 设置修改人和时间
       // category.setUpdateTime(new Date());
      //  category.setUpdateUser(1L);

        //2. 调用mapper保存
        categoryMapper.update(category);
    }
    /*//删除分类
    @Override
    public ResultInfo delete(Long id) {
        //1. 根据分类id查询当前分类下是否有菜品,如果有,返回错误
        Integer num1 = categoryMapper.countDishByCategoryId(id);
        if (num1 > 0) {
            return ResultInfo.error("当前分类下有菜品,不能删除");
        }

        //2. 根据分类id查询当前分类下是否有套餐,如果有,返回错误
        Integer num2 = categoryMapper.countSetmealByCategoryId(id);
        if (num2 > 0) {
            return ResultInfo.error("当前分类下有套餐,不能删除");
        }

        //3. 执行删除分类
        categoryMapper.delete(id);
        return ResultInfo.success(null);
    }*/

    //id ---category的id
    @Override
    public void delete(Long id) {
        //1. 根据分类id去菜品表中统计此分类id下的菜品数量,如果数量>0,就返回提示
        Integer num1 = categoryMapper.countDishByCategoryId(id);
        if (num1 > 0) {
            throw new CustomException("此分类下存在菜品,不允许删除");
        }

        //2. 根据分类id去套餐表中统计此分类id下的套餐数量,如果数量>0,就返回提示
        Integer num2 = categoryMapper.countSetmealByCategoryId(id);
        if (num2 > 0) {
            throw new CustomException("此分类下存在套餐,不允许删除");
        }

        //3. 根据分类id从分类表中删除
        categoryMapper.delete(id);
    }

    @Override
    public List<Category> findByType(Integer type) {
        //给find方法写条件，getType==type(表中的type值)
        LambdaQueryWrapper<Category> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Category::getType,type);
        return categoryMapper.selectList(wrapper);
    }


}